A-A+
A．To measure amounts of rainfall.B．To cheek th
问题详情
A．To measure amounts of rainfall.
B．To cheek the accuracy of scales.
C．To observe changes in the atmosphere.
D．To calculate the density of other metals.
参考答案
正确答案：B
解析：细节题。由Dr．Thomas的回答．．． use it to check the scales all over the country直接获得答案。
